The 5x larger air base plus oil helps sustain Minot. But really MOT only has one extra DL flight and that goes away Jan 7. When United was in GFK for the 14 months between Oct 2012 and dec 2013 no one flew on them unless a great west conference team was coming in as United was travel sponsor for the big sky conference.
Williston has always had United. Delta only added ISN then kept XWA because of oil and actually dropped service from April 2020 until June 2021 and it’s only 2 flights a day.